Patent US3259383A successfully refreshed from Google Patents.
US3259383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slotted belleville spring
Assignee: Associated Spring Corp
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Filing: 1964-06-04
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Granted: 1966-07-05
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Expires: 1984-06-04
Abstract
No abstract record available.
Inventors
- 👤 William R Johnson
- 👤 Keith A Flesher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:21
CPC Classifications
F; F16; F16B; F16B43/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A BELLEVILLE SPRING FORMED OF SPRING STRIP METAL IN THE SHAPE OF A FRUSTO-CONICAL WASHER HAVING A CENTRAL OPENING AND HAVING A PLURALITY OF CIRCUMFERENTIALLY SPACED SLOTS EXTENDING RADIALLY OF THE SPRING FROM ONE OF ITS PERIPHERIES AND DEFINING SPRING FINGERS BETWEEN ADJACENT SLOTS WHICH ARE SUBJECT TO ANTI-CLASTIC BENDING ON AXIAL DEFLECTION OF THE SPRING, EACH OF SAID FINGES BEING TRANSVERSELY CURVED IN THE UN-STRESSED CONDITION OF THE SPRING IN A DIRECTION OPPOSITE TO THE CURVATURE PRODUCED BY ANTICLASTIC BENDING THEREBY TO COMPENSATE FOR ANTI-CLASTIC BENDING OF THE FINGERS AND CAUSE EACH OF THE SPRING FINGERS TO MAINTAIN FRUSTO-CONICAL SHAPE AS THE SPRING IS DEFLECTED.
Claim 2
Dependent Claim
106 words
A BELLEVILLE SPRING FORMED OF SPRING STRIP METAL IN THE SHAPE OF A FRUSTO-CONICAL WASHER HAVING A CENTRAL OPENING AND HAVING A PLURALITY OF CIRCUMFERENTIALLY SPACED SLOTS EXTENDING RADIALLY OF THE SPRING FROM ONE OF ITS PERIPHERIES AND DEFINING SPRING FINGERS BETWEEN ADJACENT SLOTS WHICH ARE SUBJECT TO ANTI-CLASTIC BENDING ON AXIAL DEFLECTION OF THE SPRING, EACH OF SAID FINGES BEING TRANSVERSELY CURVED IN THE UN-STRESSED CONDITION OF THE SPRING IN A DIRECTION OPPOSITE TO THE CURVATURE PRODUCED BY ANTICLASTIC BENDING THEREBY TO COMPENSATE FOR ANTI-CLASTIC BENDING OF THE FINGERS AND CAUSE EACH OF THE SPRING FINGERS TO MAINTAIN FRUSTO-CONICAL SHAPE AS THE SPRING IS DEFLECTED.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-04 | 1970-01-03 | 1970-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-04 | 1974-01-03 | 1974-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-04 | 1978-01-03 | 1978-07-05 | $7700.00 | Window Closed / Lapsed |